The only way is to cheat using an action replay.
Actually, you can catch them like any Pokemon, but using correct Poke moves will help you.
They say you can get Heart Scales by doing Feeling Checks with people or you can go to Driftveil City and the house to the left and there's a girl inside and she'll ask you to show a Pokemon with the move she wants to see. Once you show the Pokemon with the correct move she'll give a Heart Scale. Hope this helps!
if you are using an AR code to modify the Pokemon you catch just go to the safari zone and use the code. if not just use a Pokemon that puts it to sleep. HOPE THIS HELPS :-D
The Poke Radar cannot be used to capture starter Pokemon. In general, the only way to get starter Pokemon is through picking your starter at the beginning of the game.
You can find the Heart Scale under ground by using the Explorer Kit.
Heart scales can typically be found underground by using the Explorer Kit.
Go underground by using your toolkit, then keep digging for treasure until you get lucky
Underwater by using dive
You capture another Trainer's Pokemon using by using a cheat code that comes in the Action Replay DS/DSi accessory, then activating the 'capture trainer pokemon' function of the Action Replay system, then throwing a Poke ball, Ultra ball, or whatever kind of POkemon catching ball you'd like to throw at Registeel, then hope for the best.
You can get them using the dowsing MCHN on the Pokewalker or you have a chance of getting them by using Rock Smash on any rock (You can get red, blue, green and yellow shards this way as well as heart scales, revives, max ethers, and fossils).
You can capture all Hoenn native pokemon, minus Jarachi and Deoxys. 200 Pokemon in all.
The only way is to cheat using an action replay.
Throw a pokeball to a Pokemon and then press b when it does its third or last move.
There is nowhere the player can capture a wild Bulbasaur in Pokemon Crystal. It can be traded using the Time Capsule.
In the beginning when you get your second Pokemon.
when you find that Pokemon if you have a master ball with you use a pokeball and you will capture it